Neural basis of responses to sex pheromones, Biology

Neural Basis of Responses to Sex Pheromones

The ability of insects to detect and discriminate between a variety of pheromones with great sensitivity depends on the presence of specific neural structures in the neuropile of the male antennal lobes. The female antennal lobe lacks these structures. The electrophysiological signals resulting from interaction between pheromonal molecules and antennal olfactory receptors are passed via the olfactory nerve to the specific part of the brain containing specific neural circuitary to decode complex pheromonal signals.

The brain then translates pheromonal information into the act of directional locomotion or orientational responses. There are pheromones that act more slowly and have longer lasting effects. For example, if a newly fertilised female mouse is caged with a strange male, the odor of that male will terminate pregnancy. The pheromone responsible comes from the urine of the male. It is received by the olfactory receptors of the female and triggers activity in the hypothalamus which directs the pituitary to release a hormone that reduces the steroid hormone output of the ovaries. The uterus does not receive adequate hormones for implantation of foetus and the pregnancy aborts.

Posted Date: 1/17/2013 1:33:16 AM | Location : United States







Related Discussions:- Neural basis of responses to sex pheromones, Assignment Help, Ask Question on Neural basis of responses to sex pheromones, Get Answer, Expert's Help, Neural basis of responses to sex pheromones Discussions

Write discussion on Neural basis of responses to sex pheromones
Your posts are moderated
Related Questions
Four major groups of lipoproteins help in transport of lipids. These include: 1.  Chylonzicrons-function is to carry dietary triacylglycerols 2.  Very  low  density lipoprot

LOCOMOTIO N IN OCTOPUS - From the ends of arms or ex-current siphon water is throughn with speed, opposite to it animal moves.

Which two of the following changes (a - d) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)? 1. Enhance in red blood cell size 2

BIO GEOGRAPHICAL EVIDENCE- The patterns of distribution of animals and plants in different parts of the globe are termed as biogeography. It is believed that around carbo

How are radioactive probes useful in DNA fingerprinting? Radioactive probes bind to specific fragments in a DNA sample like a donor gene. A probe can identify which bacteria ha

why is it known as middle man

Development of Pollen in Cyperaceae In all members of the Cyperaceae out of the four nuclei formed after meiosis, only one functions, the others degenerate. The functional nuc

general characteristics of sponges

Q. What is the destination of the notochord in protochordates and in vertebrates? In vertebrates the notochord disappears and gives birth to the spinal column known as vertebra